Rosenow, Bernd; Weißbach, Rafael; Altrock, Frank - Institut für Wirtschafts- und Sozialstatistik, … - 2007
The risk of a credit portfolio depends crucially on correlations between latent covariates, for instance the probability of default (PD) in different economic sectors. Often, correlations have to be estimated from relatively short time series, and the resulting estimation error hinders the...